The San Jose Mercury News reports ( http://bit.ly/1b6cQzH) that a divided U.S. Chemical Safety Board voted Wednesday against recommending implementation of the so-called "safety case structure," which forces a company to document how it's reducing risks.

Those who voted against the safety case recommendation say it's too complex and would take too long to implement.

The board has 120 days to modify the report.

The investigation stemmed from an Aug. 6, 2012, fire at the Richmond refinery caused by an old, corroded pipe that Chevron failed to properly monitor and replace. More than 15,000 people sought treatment for respiratory and other discomforts after the blaze.